Don't Panic! Here's How to Quickly Turn Off a Malfunctioning Water Heater
Dealing with a malfunctioning water heater can be stressful, but it's important to stay calm and act swiftly to prevent further issues. By following a few simple steps, you can safely power down your water heater in a matter of minutes.
The first signs of water heater trouble include strange new noises, like clanging or banging, odd smells, changes in your hot water temperature, or visible leaks around the tank. If you notice any of these, it's crucial to turn off your unit right away to avoid damage or flooding.
Locate the Water Heater
Start by figuring out where your water heater is located. In most homes, it's in the basement, garage, or a utility closet. Check for a large tank that's approximately two to three feet wide. Gas models will have a gas line running into them, while electric heaters connect to your electrical panel.
Identify the Type
Once you've found the water heater, look to see if it's gas or electric. This will determine how you need to shut off the power. Gas models have a dial or switches on the gas valve or front control panel. Electric heaters will simply have an electrical cord and cover panel.
Find the Shutoff Valve
There is also a shutoff valve on the cold water inlet line that controls the water supply to the tank. Locate this valve near the top or bottom of the unit. You'll need to turn this off as well.
Switch Off the Power Supply
For a Gas Water Heater:
Look for the gas control valve on the front of the tank. Turn the dial or switch to the "pilot" or "off" position. Listen for the burner to shut off. The pilot light may also go out.
For an Electric Water Heater:
Find the circuit breaker for the water heater and flip it to the "off" position. Double check that the heater is no longer heating the water by running hot water for a minute.
Close the Water Shutoff Valve
After cutting power, locate the shutoff valve on the cold water inlet line again. Turn the valve clockwise as far as it will go until fully closed. This stops any new water from entering the tank.
Drain the Storage Tank
With the power and water supply off, open the drain valve at the bottom of the tank. Attach a garden hose to direct the water away. Open the nearest hot water faucet inside the house to allow air to enter the tank so it drains freely.
Caution: The water initially draining out may still be hot!
Release Pressure Through the Relief Valve
All heaters have a T&P (temperature and pressure) relief valve near the top. Lift or turn the lever to open the valve and release any built-up steam or pressure inside.
Let the valve drain completely before closing it again by pushing the lever back down.
Turn Off the Main Water Supply (If Needed)
For major issues, you may also want to turn off the main water shutoff valve for the entire home. This is near your main water meter. Simply turn it clockwise to the off position.
With no water entering your home, this allows for a complete repair. Just remember to turn the main valve back on again after fixing the problem.
While these steps allow you to swiftly turn off your water heater in an emergency, some repairs require a qualified plumber.
Contact a professional service for:
- Replacing valves, thermostats, heating elements or entire units
- Assessing strange noises, leaks or other malfunctions
- Annual maintenance and inspections
Don't panic if you encounter water heater troubles. Just focus on safely powering down the unit. With the proper precautions, you can troubleshoot minor issues or prevent further damage until a plumber arrives.